Grain-separator



(NoModel') W. F. KEHM.

GRAIN SEPARATOR. No. 407,956. Patented July 30, 1889.

N. PETERS. Fficlo-Lilhogrzlphur, Wnshlngkon, DIC.

UNITED STATES.

PATENT OFFICE.

WILLIAM F. KEHM, or MASON orrv, IO

GRAl N-SEPARATO R.

SPECIFICATION forming part of Letters Patent No. 407,956, dated July 30, 1889.

Application filed November 3, 1888 T0 aZZ whom it may concern:

Be it known that 1, WILLIAM F. KEHM, a citizen of the United States, residing at Mason City, in the county of Oerro Gordo and State of Iowa, have invented certain new and useful Improvements in Grain-Separators; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, ref erence being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

The invention relates to the separation of straw and grain by means of shakers in a straw-carrier; and it consists in constructing and arranging the tables as hereinafter described and claimed.

Figure 1 of the drawings is a plan View, Fig. 2 a vertical longitudinal section, Fig. 3 a vertical cross-section, and Fig. 4 a detail view, of'one of the tables.

In the drawings, A A represent a pair of rising, falling, and reciprocating beams which are carried by the crank-shafts B B. Each shaft is provided with two pairs of. cranks, those marked I) being diametrically opposite to those marked Z).

a are uprights perpendicular to the bars A and supporting the slatted tables 0, which have one side 0 horizontal and the other 0' iiiclined upwardly therefrom.

The crank-shafts B are journaled in the shaker-frame D, which has an open or perforated bottom for the escape of the grain, and is set upon legs higher at one end than at the other, so as to produce the usual in- Serial no; 289,890. (No model.)

clination. The rear of the shaker-frame is usually connected detachably with the discharge end of the thrasher, so as to conveniently receive the straw and carry it ofl.

The tables 0 have the cross-slats arranged so that they will retain the straw and carry it forward, but leave it readily when ready for the return movement, while the grain will freely pass down between the slats.

I am aware that thecrank-shafts and reciprocatin g bars A are shown in the expired patent, N 0. 97,520, but by my construction and arrangement of the tables 0 with respect to the said bars and crank-shafts I more quickly separate the grain from the straw, give a more uniform movement to the straw, make the tables counterbalance, so as to prevent any side motion, and avoid pitching the straw too high. Of course the shafts B B must move with the same velocity and are actuated by any suitable mechanism.

\Vhat I seek to protect by Letters Patent The combination of the casing D, crankshafts By B, the rising, falling, and reoiprocat ing beams A A, tables 0 C,havingforwardlyinclined slats on top "and the two sets 0 c of slats, said slats in each table being arranged at an obtuse internal angle, and uprights rigidly supportin g said tables from the beams A, substantially as described.

In testimony whereof I max my signature in presence of two witnesses.

WILLIAM F. KEI-IM. Witnesses:

G. M. KEHM, LAWRENCE M. VAN AUKER. 

